Venetian blind control



A ril 29, 1952 -r. M. GERTZON VENETIAN BLIND CONTROL 2 SHEETS$HEET 1Filed Nov. 1, 1948 INVENTEESS A ril 29, 1952 M. GERTZON VENETIAN BLINDCONTROL 2 SHEETS SHEET 2 Filed Nov. 1, 1948 Z/f/I/l/ (-Ili [1 [/11INVENTE'ESJ Patented Apr. 29, 1952 UNITED STATES PATENT OFF ICE2,594,637 'VENETIAN BLIND CONTROL Thora Magdalena Gertzon, New York, N.Y.

Application November 1, 1948, Serial No.- 57533 1 5 Claims. 1Thislnvention relates in general to a Venetian blind control and inparticular to a control operated by a single cord. As far as 'I amaware, all Venetian blinds on the .market are operated with four cords.Two lifting and lowering the blind and :two for tilting the blades.

The principal object of my invention, is to provide a simple means ofoperating Venetian blinds.

Another object of my invention is to provide an improved type .lock forlocking the blind .in any position without damage to the .cord.

A still further' objec't of my invention is to provide a system ofrollers located in the support box at the .top. Said rollers are toreceive the two cords for lifting the blind, thus only one cord emergesfrom the support box. Said single cord is used for operating the blind.

A further object of my invention is to provide simple means of lifting,lowering and operating the blades with a single cord.

Further objects and advantages of my invention willtappear from thefollowing description in conjunction with attached .drawing in which:

Fig. '1 is an elevation of the operating mechanism and the principalparts of my invention applied to a Venetian blind.

Fig.2 is a transverse vertical elevation taken upon the line w-a, Fig.1.

Fig. 3 is a diagram showing the arrangement of placing the two supportcords into the support box.

Although my invention may be applied to any cover for doors and windows,regulating door and manhole cover openings, I will for the purpose of:explanation describe the invention in connection with a Venetian blindof which the box I is the support of the Venetian blind, generally madeof wood. II is a metal box embodying the principal parts of myinvention. On Fig. 1, II is shown with the cover l2 removed. The wheelsI3 are supported by their shafts going through the walls of box II andcover [2. The wheel I4 is supported by its shaft going through thecarriage [5. The spring [6 in conjunction with the wheel I4 and thecarriage I locks the cord I! when it is so desired. A wedge-like memberI8 is free to slide inside the carriage [5, operating plug I9 whichcontrols I5 through the slot which is part of I5. 2| and 22 are leversactuating a corrugated wheel 23 for tilting the blades through the bladesupport 24. 25 and 26 are pins riveted to 2| and 22 respectively. 21 isa spring washer holding tilt rail 24 at a desired angle. 28 is a forksupporting 2|, .22 and '23. 2.9 is a Venetian blind blade of which onlyone is shown; 30 is a canvas strip supporting the blades. 3] are screwsattaching box II to ill. 32 are screws attaching cover I2 to box I I. 33arecords lifting the blades 29 when the cord 11 :is pulled down. 3'4 arewheels receiving :cords .33. 3.5 are two double wheels receiving the twocords 33 when I] is pulled down. (36 are guides preventing the cords 33from twisting.

The operation of my invention is as follows-:

On Fig. l cord ['1 is held in-a locked position through the forceapplied byspring l6. Pushing the cord H toward the right will movecarriage I5 and the slide I8 to the right, releasing plug I9 into slot'20, thus "keeping the wheel l4 also at the right, leaving cord 1-! freetomove either downwards by the force of the hand, lifting the Venetianblind up; or let 'I 'I go upwards by the gravity force of the blind,thus the Venetian blind will go down. To stop it at any desiredposition, pull the cord 'I toward the left, thus 18 will push up plug I9and the spring is will move the carriage l5 and the 'wheel M into thelocked position. Pushing the cord ll forward against the pin 25 willmove the lever 2| against the wheel 2; turning 23 and 24, thus tiltingthe blades 29 clockwise facing line 11-11.

I claim:

1. A Venetian blind controlincluding an operating mechanism comprising asupport box containing three pulleys, two of "said pulleys journalledhorizontally in said support box, a T-shaped carriage movably mountedinsaid box, a spring for actuating said carriage, one of said pulleysbeing journalled horizontally in said carriage, an operating cordpassing through said pulleys, a bar movable inside said carriage, theposition of said bar being controlled by the operating cord, a plungermovable in said box, said bar actuating said plunger vertically, saidplunger controlling the relative position of said carriage by lateralmovement of said bar by said operating cord.

2. A Venetian blind control including an operating mechanism comprisinga support box, two pulleys journalled horizontally in said support box,a T-shaped carriage movably mounted in said support box, one pulleyjournalled horizontally in said carriage, an operating cord passingthrough said pulleys, said carriage being movable in one direction bysaid cord, a spring actuating said carriage in the opposite direction, abar movable laterally by said operating cord,

a plunger actuated by said bar, said plunger controlling the relativeposition of said carriage, two pins, said operating cord extendingdownward between said two pins, a lever having arms, each of said pinsbeing attached to a lever arm, a serrated wheel, said lever armsactuating said serrated wheel, turning said serrated wheel by forward orbackward movement of said operating cord, a fork attached to saidsupport box, said serrated wheel being horizontally journalled in saidfork, a spring washer, said serrated wheel being held in a steadyposition by said spring washer.

3. A Venetian blind control including an operating mechanism comprisinga support box, three pulleys, a T-shaped carriage, a spring, a plunger,a bar and an operating cord, two pins, said operating cord extendingthrough said pulleys and extending downward between said two pins, leverarms, said pins being attached to said lever arms, a fork, a serratedwheel, said lever arms and said wheel being journalled in said fork, aspring washer tightening said serrated wheel, a shaft keyed to saidserrated wheel extending laterally through said fork, said fork attachedto said support box, said operating cord extended laterally into adistribution box comprising four horizontally journalled pulleys andseven guides guiding the lifting cords when the Venetian blind isopened, said distribution box containing all of said lifting cords whenthe Venetian blind is open, only said operating cord extending throughsaid operating mechanism.

4. A Venetian blind control comprising a support box, two pulleysjournalled horizontally in said support box, a T-shaped carriage, onesaid pulleys journalled horizontally in said carriage, a springactuating said carriage, a bar inside said carriage, a plunger actuatedby said bar, an operating cord extended through said pulleys and throughsaid bar, two pins, said operating cord further extending between saidtwo pins, two lever arms, said pins being attached to said lever arms, aspring washer for holding said wheel steady, a fork attached to saidsupport box, said serrated wheel and said lever arms being horizontallyjournalled therein, said operating cord extending into a distributionbox having two pulleys and seven guides, the other end of said operatingcord extending into said box, two lifting cords attached to saidoperating cord, said lifting cords supported by two pulleys in saiddistribution box.

5. A Venetian blind control comprising a support box, three pulleys, aspring, a T-shaped carriage, a plunger, a bar, two pins and an operatingcord, said operating cord extending downward through said pulleys andbetween said pins, two of said pulleys being horizontally journalled insaid support box and one of said pulleys horizontally journalled in saidT-shaped carriage, a pipe attached to said support box for supportingsaid spring, said plunger actuated up and down by said bar, and said barbeing actuated by lateral movement of said operating cord, lever arms,said operating cord actuating said lever arms through said pins, aserrated wheel, said lever arms turning said serrated wheel in eitherdirection by for ward or backward movement of said operating cord, adistribution box, cord pulleys and guides in said box, said operatingcord extending into said distribution box through two pulleys and sevenguides, lifting cords supported by two of said pulleys and attached tosaid operating cords, said distribution box containing all lifting cordswhen the Venetian blind is open permitting only said operating cord topass through said operating mechanism.

THORA MAGDALENA GERTZON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 909,927 McKnight Jan. 19, 19091,807,061 Dunn May 26, 1931 1,952,739 Weisfeld Mar. 27, 1934 1,973,933Shehan Sept. 18, 1934 2,064,094 Wiener Dec. 15, 1936

